"Jumbo" fire sprinkler

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ccs46
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Firefly wrote:I got this last week. Its commonly referred to as a "jumbo". I've never been able to find any literature on them in my old books, but the consensus among us sprinkler guys is that they were used as an early ESFR type head. The few fitters to run into them in the field have said they were installed at the tops of elevator shafts or pipe chases. Quite interesting, it has 1 1/4" threads as opposed to the more standard 1/2" and 3/4".

Next to it are other models of the same brand, in standard size.
So how many GPM can it disperse?
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ccs46
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Firefly wrote:That's a good question. I am unable to find any literature, including any kind of old data sheets...they're just that rare.
Wow. I might be able to do some math.
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ccs46
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Lambda wrote:Back then they were made by hand so wouldn't doubt it. Here are 5 of the oldest ones I have - the first one says "Grinnell Quartzoid" but the date is unreadable, given they were introduced in the 1940's, may be the oldest one I have but cannot verify. The three in the middle are the Hodgman D sprinklers - 1952 to 1959. The one on the right is a Central D 1969.
That Central D Looks like it has a bottle cap for the disperser! :lol: Image
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Those things are HUGE! I would be concerns if one of those fell out of the ceiling! :lol:
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